Answers

What are the best energy efficient blinds or window treatments for very large windows?

I have a very large window and need a large blind or some type of window treatment. I'd like some privacy, but would like the option of being able to change it (i.e. I don't want to just cover it up).
I've attached a photo of the window.

The most often recommended window covering for efficiency is a cellular shade.

Please note that as you keep more of the interior heat from reaching the interior window surface, the potential for condensation will go up with that reduction in heat exposure as a result of the window's lower surface temperature.

If replacing the window is an option, then Pella Designer Series windows are available with triple-pane glass and removable miniblinds or shades inside a glass hinged panel. The blinds or shades don't get dirty and the extra glass panel makes the windows very energy-efficient. However, the frame size of the fixed window or large awning would have to be 59 inches or less to be ordered with a blind or shade. The maximun width on a casement would be 35 inches. Maximum height would be 73 inch frame size on either.

If your window treatment turns out to be expensive, compare the cost to replacing the windows themselves.

Hi Charles. Allen Construction has a two part answer to your question: 1) In terms of energy efficiency, you will get the best protection from solar heat gain by putting a shade on the outside of the glass. If it has to be on the inside, there are specific treatments called solar shades or sun shades that are specifically designed to block heat and glare. They also can have varying degrees of visibility as well. 2) As far as shades the will offer you both privacy and visibility, top down / bottom up shades provide a good level of control so you can constantly adjust between proper shading and still letting ambient light through. There are pleated (e.g., honeycomb shades by Hunter Douglas) that are also energy efficient. Roman shades with lining can also be drawn up to expose the view. HOpe that helps!